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Atlantirivulus maricensis  Costa, 2014

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Atlantirivulus maricensis
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Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Cyprinodontiformes (Rivulines, killifishes and live bearers) > Rivulidae (Rivulines)
Etymology: maricensis: The specific name is in reference to the occurrence of the new species in the Maricá lagoon system.

Environment / Climate / Range Ecology

Freshwater; benthopelagic; pH range: 6.0 - 6.4.   Tropical; 25°C - ? (Ref. 102354), preferred ?

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

South America: river drainages connected to the Maricá lagoon system in Rio de Janeiro state, Brazil.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 3.8 cm SL male/unsexed; (Ref. 102354)

Short description Morphology | Morphometrics

Dorsal soft rays (total): 7-9; Anal soft rays: 14 - 16; Vertebrae: 33 - 34. Atlantirivulus maricensis can be diagnosed from all other species of the genus Atlantirivulus by the following combination of characters: lateral line divided into two sections (vs. single); lateral line with one neuromast by scale (vs. lateral line often interrupted by scales without neuromasts); scales in the longitudinal series 33-35 (vs. 30-31); vertebrae 33-24 (vs. 31-32); caudal fin with 30-31 rays (vs. 25 - 29); small, horizontally elongated black spot on dorsal portion of caudal-fin base in females, not contacting fin margin (vs. female caudal spot never horizontally elongated, often triangular or rectangular, reaching fin margin, sometimes spot absent); flank with horizontal rows of red dots in males and small light brown spots in females (vs. never a similar color pattern, red pigmentation when present often forming irregular bars or reticulations in males); caudal fin in males greenish yellow, sub-dorsal and sub-ventral portions bright yellow, dorsal and marginal region diffuse orangish grey, posterior marginal portion diffuse pale greyish yellow (vs. never a similar color pattern); small red spots on the basal and posterior portions of the dorsal fin in males (vs. red spots absent).

Biology     Glossary (e.g. epibenthic)

Found in creek under a forest remnant and in small shallow stream, partially protected by a secondary forest remnant (Ref. 102354).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator : Costa, Wilson J.E.M. | Collaborators

Costa, W.J.E.M., 2014. Four new species of the genus Atlantirivulus (Cyprinodontiformes: Rivulidae) from the Brazilian Atlantic Forest. Verteb. Zool. 64(1):9-21. (Ref. 102354)

IUCN Red List Status (Ref. 115185)

CITES (Ref. 94142)

Not Evaluated

Threat to humans

  Harmless




Human uses

FAO(Publication : search) | FisheriesWiki |

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